ajax.php

<?php

/*
Plugin Name: Test Ajax
Plugin URI: https://fullworks.net
Description: A demo of ajax calls to the Widget for Eventbrite plugin shortcode
Version: 1.0
Author: Alan Fuller
Author URI: https://fullworks.net
License: GPL3
*/

add_action( 'wp_enqueue_scripts', 'ajax_test_enqueue_scripts' );
function ajax_test_enqueue_scripts() {
 wp_enqueue_script( 'test', plugins_url( '/test.js', __FILE__ ), array( 'jquery' ), '1.0', true );
 wp_localize_script( 'test', 'test', array(
 'ajax_url' => admin_url( 'admin-ajax.php' )
 ) );
}


add_action( 'wp_ajax_nopriv_test_wfea', 'test_wfea' );
add_action( 'wp_ajax_test_wfea', 'test_wfea' );

function test_wfea() {
 if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
 $atts=array();
 $atts['layout']='grid';
 if (!empty($_POST['filter'])) {
 $atts['filter_title']= '/'.$_POST['filter'].'/i';    // the filter is extended to add regex ignore case
 }
 $wfea = new WidgetForEventbriteAPI/FrontEnd/FrontEnd('widget-for-eventbrite-api','1.4');
 $out = $wfea->build_shortcode( $atts );
 echo (empty($out))?'... nothing found try again ...':$out;
 }
 die();
}